EMRAS II- WG1 Dejanira da Costa Lauria (BRAZIL) Scenario A version - - PowerPoint PPT Presentation

EMRAS II- WG1

Dejanira da Costa Lauria (BRAZIL)

Scenario A version 2

• CROM code based on SRS 19 (screening code)
• The code is a beta version-attempt to run it and to

inform CIEMAT the problems we have met.

• Some improvements were done. but there is still place to

improve.

• A group of study was created consisting of people from

the Reactors. Regulatory Authority and Technical Service Office.

• GEN II code was bought

Reported Results

 Total concentration in water & Dissolved concentration

in water;

 Concentration in suspended sediment  Concentration in bottom sediment (Csb)  Concentration in shoreline sediment (Css)

 Css=60*Csb

4

Nuclear Power Plants at Angra dos Reis

CNAAA unit 1 (Angra 1) -Westinghouse 600 Mwe: it started

• peration in 1982

CNAAA unit 2 (Angra 2)- KWU 1300 Mwe;Operation started in 2000

Discharge Channel

Liquid effluent discharge is not continuous Meteorological data are integrated and are directly put in the dose codes (online monitoring)

Which scenario should we choose?

• Angra nuclear power plant scenario.

– No homogeneous human group was identified. – Four age groups are considered: – Child (0-7years). Child (7-12 years). Adolescent (12-17

years) and Adult (>17 years)

– For each age group: the habits and consumption rates are

from the most exposure individuals (95% percentile of the distribution of consumption rate of local products and the spent time on the beach)

– Location of the groups: 1000 meters from the reactor site – Individual age group doses are reported

Exposure pathways

• Atmosphere
• Radionuclides: Co-58. Co-60.Cs-134. Cs-137. Ce-144. Sr-90.

Pu-239. Pu-240. I-131. I-133.

• Exposure pathways:
• External Irradiation-Gamma and beta direct exposure in the plume
• External irradiation- Gamma from the ground
• Inhalation
• Ingestion (vegetables. milk. meat)

 Liquid Effluent

 Radionuclides: Co-58. Co-60. Sr-90. I-131. Cs-134. Cs-137. H-3

 Ingestion of marine products

 Fish and seafood  External irradiation –gamma from the beach

Consumption rate

Exposure pathway Age Group Child Adolecent Adult Vegetable (kg/a) 1.93E+01 2.18E+01 3.03E+01 Grain (kg/ano) 8.20E-01 8.30E-01 1.30E+00 Meat (kg/ano) 2.67E+00 2.94E+00 3.58E+00 Milk (litros/ano) 6.66E+00 6.66E+00 4.99E+00 Fish (kg/ano) 1.14E+01 8.91E+00 2.05E+01 Seafood (kg/ano) 1.02E+00 1.82E+00 3.24E+00 Time on the beach (hours/year) 2.41E+02 1.99E+02 2.41E+02 Inhalation (m3/a) 1.88E+03 5.58E+03 8.10E+03

What is the objective?

 Collective dose & Individual dose  Age groups  Beta dose